Best Buy will begin price matching all local retail competitors and 19 major onine competitors in all product categories and on most in-stock products whenever asked by a customer.

They call it their Low Price Guarantee, and it starts March 3.

Best Buy will match the current pre-tax price for new, identical and immediately available products from a local retail competitor's store and the following online retailers: Amazon.com, Apple.com, Bhphotovideo.com, Buy.com, Crutchfield.com, Dell.com, Frys.com, hhgregg.com, HP.com, HomeDepot.com, Lowes.com, Newegg.com, OfficeDepot.com, OfficeMax.com, Sears.com, Staples.com, Target.com, TigerDirect.com and Walmart.com. Matching will also be done between their stores and BestBuy.com.

They will also match prices post purchase if they lower their price within 15 days of your purchase.

Best Buy said this will end the showrooming trend, where shoppers go to the brick and mortar store to look at products, and then buy them online for a lower price.